Delphi 7, released in 2002, is widely regarded as one of the most stable and beloved versions of Borland’s flagship RAD environment. Paired with Indy 9 (which was the standard networking library at the time), it powered thousands of email clients, FTP tools, and HTTPS-enabled applications. However, as the internet transitioned almost exclusively to TLS 1.2 and above, and as Windows Server and client operating systems evolved, this error began plaguing developers trying to keep their legacy applications alive.
A simpler approach: Use TNetHTTPClient from Delphi 10+ – but that does not help Delphi 7. Instead, use by François Piette, which includes native Schannel support. Solution 4: Upgrade Indy (Most Robust, Highest Effort) Indy 9 is frozen in time. The modern Indy 10 (still maintained as open source) can be compiled for Delphi 7 with effort.
For quick internal tools on legacy networks, dropping OpenSSL 0.9.8 DLLs into your app folder still works. For any application exposed to the modern internet, you must either patch Indy 9 for TLS 1.2, upgrade to Indy 10, or implement a proxy architecture.
HTTP.IOHandler := SSL; HTTP.HandleRedirects := True;
Delphi 7, released in 2002, is widely regarded as one of the most stable and beloved versions of Borland’s flagship RAD environment. Paired with Indy 9 (which was the standard networking library at the time), it powered thousands of email clients, FTP tools, and HTTPS-enabled applications. However, as the internet transitioned almost exclusively to TLS 1.2 and above, and as Windows Server and client operating systems evolved, this error began plaguing developers trying to keep their legacy applications alive.
A simpler approach: Use TNetHTTPClient from Delphi 10+ – but that does not help Delphi 7. Instead, use by François Piette, which includes native Schannel support. Solution 4: Upgrade Indy (Most Robust, Highest Effort) Indy 9 is frozen in time. The modern Indy 10 (still maintained as open source) can be compiled for Delphi 7 with effort.
For quick internal tools on legacy networks, dropping OpenSSL 0.9.8 DLLs into your app folder still works. For any application exposed to the modern internet, you must either patch Indy 9 for TLS 1.2, upgrade to Indy 10, or implement a proxy architecture.
HTTP.IOHandler := SSL; HTTP.HandleRedirects := True;